... transparency,high cleanliness,hypoallergenic and no odor 3.use for pillow,cushion,mattress 1.Specification: White Duck Feather 2-4 cm2. ... one hour, dehydrated for 15 minutes, dried in drying machine at temperature 80C for no less than 30 minutes, cooling ... degreasing,sterilizing, the produced down has the characters of high filling power, high cleanliness, great warmth and it is hypoallergenic ...